Love and sacrifice might be a big theme. They might have to sacrifice some of their individual goals for the sake of their relationship. And of course, there's the love that brought them together in the first place. For instance, they could be facing a great danger and be willing to sacrifice themselves for each other.
Another theme could be the integration of their two worlds. Percy is from the Poseidon side and Piper has her own heritage. In fanfiction, they might have to deal with the politics and expectations of both of their worlds as a married couple. This could involve things like dealing with other demigods' reactions and any potential power struggles within their families.
One common theme is friendship. Since they are both from the same world of demigods, their friendship is often explored. Another theme is adventure. They usually go on some sort of journey together, whether it's to save the camp or to find a lost artifact.
One common theme is the disruption of the normal order. For example, in many stories, the gods' rules or the Camp Half - Blood's usual way of life is thrown into chaos, and Percy and Piper have to adapt. Another theme is the growth of their characters. Through facing chaos, they learn more about themselves and become stronger.
One common theme is the exploration of forbidden love. Since they are part of different story arcs in the original series, their relationship in fanfiction often goes against the norm. Another theme is friendship turned into something more. They start as friends or comrades and then develop deeper feelings.
One common theme is the struggle between their different personalities. Percy is more laid - back and impulsive, while Piper is more reserved and calculating at times. Another theme could be how they deal with their shared past and the challenges that come with it.
Yes, there are some. You can start by looking on popular fanfiction websites like Archive of Our Own. Some stories might explore their relationship in unique ways, like how they deal with the challenges of being in a relationship within the context of their world's mythology.
One common theme is the idea of an unlikely union. Percy, a demigod, and Nyx, a goddess, are from different strata of the mythological world, so their coming together is always an interesting exploration.
Love across different statuses is also a theme. They come from different 'ranks' in the mythological world, and the fanfictions often explore how they bridge that gap. For example, in some stories, Percy has to deal with the jealousy or disapproval of other demigods who might think he's getting special treatment because of his relationship with Apollo.
One common theme is the overcoming of differences. Percy and Zoe come from different backgrounds, and fanfictions often explore how they bridge those gaps. Another theme is the idea of loyalty. Both characters are known for their loyalty in the original stories, and in the fanfictions about their marriage, this loyalty is a strong foundation for their relationship.
One common theme is friendship. Since they are both part of the same universe, fanfics often explore how their different personalities can form a strong bond of friendship. Another theme is adventure, as they are both used to going on quests and facing challenges in the original stories.
A prevalent theme is the struggle between the normal high school life and their demigod responsibilities. They have to attend classes, make friends, and deal with typical teen issues like dating and popularity, all while being ready to fight off monsters or deal with godly tasks. Also, loyalty often comes up as a theme, loyalty to their friends, to their demigod community, and to the school they are trying to protect from any supernatural threats.